Lifting jack



FIG. 1 is a front and side perspective view of a lifting jack showing mynew design;

FIG. 2 is a top, rear and side perspective view thereof;

FIG. 3 is a side elevational view thereof, the opposite side elevationalview being a mirror image of that shown;

FIG. 4 is an exploded front perspective view of the lifting assembly.The reaming portion of the lifting jack being omitted for convenience ofillustration; and,

FIG. 5 is a top plan view thereof.

The ornamental design for a lifting jack, as shown and described.